• Steel Grades
  • Common grades: Q235, Q345, Q390, Q420 (Chinese standards); ASTM A36, A572 (U.S. standards); S235, S355 (European standards).
  • Strength grades: Tensile strength ≥375-550 MPa, yield strength ≥235-420 MPa (varies by grade).
• Section Steel Types
  • Hot-rolled H-sections, square/rectangular tubes, circular tubes, I-beams, box columns.
  • Cold-formed thin-walled sections (for secondary components).
• Auxiliary Materials
  • High-strength bolts: Grade 8.8, 10.9 .
  • Welding materials: Electrodes/wires compatible with base metal .
  • Fireproof coatings: Intumescent (1-3 mm thickness) or cementitious (10-40 mm thickness).

• Columns (Vertical Load-Bearing Members)
  • Cross-sectional dimensions: H-sections range from H200×200×8×12 to H500×500×20×30 (mm).
  • Box columns: 400×400×16 to 800×800×30 ,wall thickness 16-40 mm.
  • Slenderness ratio control: λ ≤ 80 ,stricter for seismic design.
• Beams (Horizontal Load-Bearing Members)
  • Cross-sectional types: H-sections, I-beams.
  • Span: 6-12 m.
  • Depth-to-span ratio: 1/15-1/25.
• Floor Systems
  • Composite deck slabs: Profiled steel sheet (0.8-1.5 mm) + concrete (100-150 mm).
  • Steel bar truss deck slabs: Span 3-6 m, suitable for large spaces.
• Bracing Systems
  • Types: Concentric braces (X/V-shaped), eccentric braces (preferred for seismic resistance).
  • Sections: Angle steel , H-sections , or circular tubes.

• Beam-Column Joints
  • Rigid connections: Fully welded or bolted-welded hybrid (flange welded, web bolted).
  • Hinged connections: Web bolted only.
  • Seismic joints: Follow "strong joint, weak component" principle (e.g., stiffener plates).
• Column Bases
  • Embedded base: Depth ≥1.5× column section height in concrete foundation.
  • Encased base: Encasing concrete height ≥2× column section height.
• Bolted Connections
  • Friction-type high-strength bolts: Preload-controlled.
  • Bolt spacing: ≥3× bolt diameter; edge distance ≥1.5× diameter.

• Load Parameters
  • Seismic fortification intensity: 6-9 degrees.
  • Wind load: Basic wind pressure 0.3-0.7 kN/m².
  • Live load: 2.0-5.0 kN/m².
• Structural Performance Requirements
  • Inter-story drift limit: 1/250, 1/50.
  • Natural vibration period: Generally ≤0.1N (N = number of stories).
• Corrosion & Fire Protection
  • Anti-corrosion: Hot-dip galvanizing or epoxy zinc-rich primer.
  • Fire resistance: 1-3 hours.

• Fabrication Tolerance
  • Component length: ±2 mm/6 m.
  • Bolt hole spacing: ±1.5 mm.
• Installation Requirements
  • Verticality deviation: ≤H/1000 and ≤25 mm (total height).
  • Weld quality: Grade I (full penetration) or Grade II (partial penetration).

• Building Types: Offices, hotels, apartments, commercial complexes.
• Typical Height: 6-40 stories (20-150 m).
• Economic Spans: 6-12 m (main beams), 3-6 m (secondary beams).

We are committed to providing customers with one-stop construction solutions. Our services cover consulting, design, production, transportation, construction, and after-sales service. A professional construction team provides global guidance and installation services for your projects.

To better serve the global market, we have obtained CE certification (EN1090 certificate), international general steel structure high-level certificates, and overseas contracting engineering business qualifications. Our products and construction services have been exported to more than 120 countries around the world, including regions in Asia, Africa, North and South America, Oceania, and Europe.

Our core competitiveness is derived from our long-term pursuit of technological breakthroughs. We have over 100 senior technical talents and have established cooperative relationships with prominent universities and research institutions. By integrating steel structure systems, we continue to innovate in new products, models, and workflows to bring breakthroughs to our global clientele.

• 1. Project Consulting: Provide professional consulting services tailored to client requirements and formulate optimized structure plans.
• 2. Design Services: Utilize advanced design software and engineering technologies to provide accurate and efficient layouts.
• 3. Manufacturing: Leverage advanced production bases to fabricate high-quality steel structures.
• 4. Logistics & Transportation: A complete logistics network ensures that all components arrive at the construction site safely and on schedule.
• 5. Construction & Installation: Professional installation teams ensure structure setup is done correctly and with premium quality.
• 6. After-sales Service: Comprehensive after-sales support systems resolve any project-related concerns.